diff --git a/src/va_agent/notifications.py b/src/va_agent/notifications.py
index 4177937..2e12eda 100644
--- a/src/va_agent/notifications.py
+++ b/src/va_agent/notifications.py
@@ -78,9 +78,7 @@ class NotificationDocument(BaseModel):
 class NotificationBackend(Protocol):
     """Backend-agnostic interface for notification storage."""
 
-    async def get_recent_notifications(
-        self, phone_number: str
-    ) -> list[Notification]:
+    async def get_recent_notifications(self, phone_number: str) -> list[Notification]:
         """Return recent notifications for *phone_number*."""
         ...
 
@@ -113,9 +111,7 @@ class FirestoreNotificationBackend:
         self._max_to_notify = max_to_notify
         self._window_hours = window_hours
 
-    async def get_recent_notifications(
-        self, phone_number: str
-    ) -> list[Notification]:
+    async def get_recent_notifications(self, phone_number: str) -> list[Notification]:
         """Get recent notifications for a user.
 
         Retrieves notifications created within the configured time window,
@@ -148,9 +144,7 @@ class FirestoreNotificationBackend:
             cutoff = time.time() - (self._window_hours * 3600)
 
             parsed = [
-                n
-                for n in document.notificaciones
-                if n.timestamp_creacion >= cutoff
+                n for n in document.notificaciones if n.timestamp_creacion >= cutoff
             ]
 
             if not parsed:
@@ -212,9 +206,7 @@ class RedisNotificationBackend:
         self._max_to_notify = max_to_notify
         self._window_hours = window_hours
 
-    async def get_recent_notifications(
-        self, phone_number: str
-    ) -> list[Notification]:
+    async def get_recent_notifications(self, phone_number: str) -> list[Notification]:
         """Get recent notifications for a user from Redis.
 
         Reads from the ``notification:{phone}`` key, parses the JSON
@@ -246,9 +238,7 @@ class RedisNotificationBackend:
             cutoff = time.time() - (self._window_hours * 3600)
 
             parsed = [
-                n
-                for n in document.notificaciones
-                if n.timestamp_creacion >= cutoff
+                n for n in document.notificaciones if n.timestamp_creacion >= cutoff
             ]
 
             if not parsed: